Cost per egg calculator

Feed, other running costs and how many eggs you collect → what each egg and each dozen costs you.

$0.24per egg

$2.91 per dozen · $7.28 a week

4.5 lb of feed per dozen · 5 eggs per hen a week

$2.04 a dozen less than the $4.95 store price you entered.

Free
No account
Works offline
Data stays on this device

Made from Eggonomics

Cost per egg, no spreadsheet

Open the full Eggonomics in your browser → About Eggonomics

Want Eggonomics on your phone? It's a community proposal — 100 upvotes and we build it.

This is a community proposal. We build the iPhone/Android app once it reaches 100 upvotes.

Upvote Eggonomics 0 of 100 upvotes · sign in with Google to vote

How it's calculated

Feed cost per week = bag price × 7 ÷ days one bag lasts.
Other costs per week = your monthly bedding, grit, oyster shell and similar costs × 12 ÷ 52.
Cost per egg = (feed cost per week + other costs per week) ÷ eggs collected per week. Cost per dozen = cost per egg × 12.
Startup costs (the coop, chicks, feeders) are left out so the number is what it costs to keep producing. Eggonomics, the full app, tracks payback on those separately.
Feed per dozen (bag weight × 7 ÷ days a bag lasts ÷ eggs a week × 12) is a check on your numbers. The University of Maryland and University of Delaware layer-flock budget assumes 4.5 lb of feed per dozen eggs.

Worked example

Six hens lay 30 eggs a week. A 50 lb bag costs $22 and lasts 31 days, and bedding and grit come to $10 a month. Feed: $22 × 7 ÷ 31 = $4.97 a week. Other: $10 × 12 ÷ 52 = $2.31 a week. Total $7.28 ÷ 30 eggs = $0.24 per egg, or $2.91 per dozen. Feed per dozen: 50 × 7 ÷ 31 ÷ 30 × 12 = 4.5 lb, which matches the Extension budget.

Sources

Backyard Layer Flock Economics (FS-2025-0783) — University of Maryland Extension and University of Delaware Cooperative Extension
Budget for a small laying flock; uses a feed conversion of 4.5 lb of feed per dozen eggs.

Questions

Why do you ask how long a bag lasts instead of how much each hen eats?

Because you know it. Write the date on the bag when you open it and count the days until it's empty. That number already includes spilled feed and feed the wild birds took, which a per-hen estimate leaves out.

Does it include the cost of the coop and the chickens?

No. This is the running cost per egg. Startup costs change the payback date, not what the next dozen costs. The full Eggonomics app tracks both.

My feed per dozen is far above 4.5 lb. What does that mean?

Either the flock is laying less than you think (molting, short winter days, older hens) or feed is being wasted or eaten by pests. The 4.5 lb figure comes from an Extension budget, so treat it as a rough benchmark, not a rule.

Where is my data stored?

Only in this browser's local storage. Nothing you type is sent to a server.

By the All Things AI team · Last tested 17 October 2026 · Questions or a wrong number? support@allthingsn.com